新gre数学重要考点:Multiplying Polynomials
Multiplying Polynomials
To multiply two polynomials, open up the first polynomial and multiply the second polynomial with each term.
Example:
If we multiply and ,we get =3x+2=12x3-3x2+3x+8x2-2x+4=12x3+x2+x+4=12x3+5x2+x+4.
Remember:
Do not froget to multiply all the terms.
Repeat distributive law when multiplying polynomials.
新gre数学重要考点:Subtracting Polynomials
Subtracting Polynomials
To subtract polynomial from another, subtract the like terms. Like terms are those with the same variable and identical power.
Example:
By subtracting from ,we get 4x2+x+=4x2-4x.
Remember:
Only subtract the like terms.
新gre数学重要考点:Adding Polynomials
Adding Polynomials
To add two polynomials, add the like terms. Like terms are those with the same variables and identical powers.
Example:
By adding and , we get 4x2++=4x2+2x+4.
Remember:
Only add the like terms.
新gre数学重要考点:Polynomials
Polynomials
Any expression with one or more terms is called polynomial.
Example:
3x+2,4x2-x+2,and 4x+3xy+y2are all polynomials.
)and sin are not polynomials.
Remember:
Order of a polynomial is the highest power of any variable.
The highest power in an n-th order polynomial is n.
Both monomials and binomials are polynomials of order 1 and 2, respectively.
由于美国数学基础教育的难度增加导致数学考试越来越难,但新gre数学复习考点都是高中时候学到的知识点,考生不要过于紧张,把基本概念弄明白,再记住一些新版gre数学必备的词汇,那么相信新版gre数学应该没有问题。
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